static int ohci_usb_remove(struct udevice *dev)
{
struct generic_ohci *priv = dev_get_priv(dev);
int ret;
ret = ohci_deregister(dev);
if (ret)
return ret;
if (generic_phy_valid(&priv->phy)) {
ret = generic_phy_exit(&priv->phy);
if (ret)
return ret;
}
ret = reset_release_all(priv->resets, priv->reset_count);
if (ret)
return ret;
return clk_release_all(priv->clocks, priv->clock_count);
}
static int ohci_usb_probe(struct udevice *dev)
{
struct ohci_regs *regs = (struct ohci_regs *)devfdt_get_addr(dev);
struct generic_ohci *priv = dev_get_priv(dev);
int i, err, ret, clock_nb, reset_nb;
err = 0;
priv->clock_count = 0;
clock_nb = dev_count_phandle_with_args(dev, "clocks", "#clock-cells");
if (clock_nb > 0) {
priv->clocks = devm_kcalloc(dev, clock_nb, sizeof(struct clk),
GFP_KERNEL);
if (!priv->clocks)
return -ENOMEM;
for (i = 0; i < clock_nb; i++) {
err = clk_get_by_index(dev, i, &priv->clocks[i]);
if (err < 0)
break;
err = clk_enable(&priv->clocks[i]);
if (err) {
pr_err("failed to enable clock %d\n", i);
clk_free(&priv->clocks[i]);
goto clk_err;
}
priv->clock_count++;
}
} else if (clock_nb != -ENOENT) {
pr_err("failed to get clock phandle(%d)\n", clock_nb);
return clock_nb;
}
priv->reset_count = 0;
reset_nb = dev_count_phandle_with_args(dev, "resets", "#reset-cells");
if (reset_nb > 0) {
priv->resets = devm_kcalloc(dev, reset_nb,
sizeof(struct reset_ctl),
GFP_KERNEL);
if (!priv->resets)
return -ENOMEM;
for (i = 0; i < reset_nb; i++) {
err = reset_get_by_index(dev, i, &priv->resets[i]);
if (err < 0)
break;
err = reset_deassert(&priv->resets[i]);
if (err) {
pr_err("failed to deassert reset %d\n", i);
reset_free(&priv->resets[i]);
goto reset_err;
}
priv->reset_count++;
}
} else if (reset_nb != -ENOENT) {
pr_err("failed to get reset phandle(%d)\n", reset_nb);
goto clk_err;
}
err = generic_phy_get_by_index(dev, 0, &priv->phy);
if (err) {
if (err != -ENOENT) {
pr_err("failed to get usb phy\n");
goto reset_err;
}
} else {
err = generic_phy_init(&priv->phy);
if (err) {
pr_err("failed to init usb phy\n");
goto reset_err;
}
}
err = ohci_register(dev, regs);
if (err)
goto phy_err;
return 0;
phy_err:
if (generic_phy_valid(&priv->phy)) {
ret = generic_phy_exit(&priv->phy);
if (ret)
pr_err("failed to release phy\n");
}
reset_err:
ret = reset_release_all(priv->resets, priv->reset_count);
if (ret)
pr_err("failed to assert all resets\n");
clk_err:
ret = clk_release_all(priv->clocks, priv->clock_count);
if (ret)
pr_err("failed to disable all clocks\n");
return err;
}
int board_usb_init(int index, enum usb_init_type init)
{
struct fdtdec_phandle_args args;
struct udevice *dev;
const void *blob = gd->fdt_blob;
struct clk clk;
struct phy phy;
int node;
int phy_provider;
int ret;
/* find the usb otg node */
node = fdt_node_offset_by_compatible(blob, -1, "snps,dwc2");
if (node < 0) {
debug("Not found usb_otg device\n");
return -ENODEV;
}
if (!fdtdec_get_is_enabled(blob, node)) {
debug("stm32 usbotg is disabled in the device tree\n");
return -ENODEV;
}
/* Enable clock */
ret = fdtdec_parse_phandle_with_args(blob, node, "clocks",
"#clock-cells", 0, 0, &args);
if (ret) {
debug("usbotg has no clocks defined in the device tree\n");
return ret;
}
ret = uclass_get_device_by_of_offset(UCLASS_CLK, args.node, &dev);
if (ret)
return ret;
if (args.args_count != 1) {
debug("Can't find clock ID in the device tree\n");
return -ENODATA;
}
clk.dev = dev;
clk.id = args.args[0];
ret = clk_enable(&clk);
if (ret) {
debug("Failed to enable usbotg clock\n");
return ret;
}
/* Reset */
ret = fdtdec_parse_phandle_with_args(blob, node, "resets",
"#reset-cells", 0, 0, &args);
if (ret) {
debug("usbotg has no resets defined in the device tree\n");
goto clk_err;
}
ret = uclass_get_device_by_of_offset(UCLASS_RESET, args.node, &dev);
if (ret || args.args_count != 1)
goto clk_err;
usbotg_reset.dev = dev;
usbotg_reset.id = args.args[0];
reset_assert(&usbotg_reset);
udelay(2);
reset_deassert(&usbotg_reset);
/* Get USB PHY */
ret = fdtdec_parse_phandle_with_args(blob, node, "phys",
"#phy-cells", 0, 0, &args);
if (!ret) {
phy_provider = fdt_parent_offset(blob, args.node);
ret = uclass_get_device_by_of_offset(UCLASS_PHY,
phy_provider, &dev);
if (ret)
goto clk_err;
phy.dev = dev;
phy.id = fdtdec_get_uint(blob, args.node, "reg", -1);
ret = generic_phy_power_on(&phy);
if (ret) {
debug("unable to power on the phy\n");
goto clk_err;
}
ret = generic_phy_init(&phy);
if (ret) {
debug("failed to init usb phy\n");
goto phy_power_err;
}
}
/* Parse and store data needed for gadget */
stm32mp_otg_data.regs_otg = fdtdec_get_addr(blob, node, "reg");
if (stm32mp_otg_data.regs_otg == FDT_ADDR_T_NONE) {
debug("usbotg: can't get base address\n");
ret = -ENODATA;
goto phy_init_err;
}
stm32mp_otg_data.rx_fifo_sz = fdtdec_get_int(blob, node,
"g-rx-fifo-size", 0);
stm32mp_otg_data.np_tx_fifo_sz = fdtdec_get_int(blob, node,
"g-np-tx-fifo-size", 0);
stm32mp_otg_data.tx_fifo_sz = fdtdec_get_int(blob, node,
"g-tx-fifo-size", 0);
/* Enable voltage level detector */
if (!(fdtdec_parse_phandle_with_args(blob, node, "usb33d-supply",
NULL, 0, 0, &args))) {
if (!uclass_get_device_by_of_offset(UCLASS_REGULATOR,
args.node, &dev)) {
ret = regulator_set_enable(dev, true);
if (ret) {
debug("Failed to enable usb33d\n");
goto phy_init_err;
}
}
}
/* Enable vbus sensing */
setbits_le32(stm32mp_otg_data.regs_otg + STM32MP_GGPIO,
STM32MP_GGPIO_VBUS_SENSING);
return dwc2_udc_probe(&stm32mp_otg_data);
phy_init_err:
generic_phy_exit(&phy);
phy_power_err:
generic_phy_power_off(&phy);
clk_err:
clk_disable(&clk);
return ret;
}
static int ehci_usb_probe(struct udevice *dev)
{
struct generic_ehci *priv = dev_get_priv(dev);
struct ehci_hccr *hccr;
struct ehci_hcor *hcor;
int i, err, ret, clock_nb, reset_nb;
err = 0;
priv->clock_count = 0;
clock_nb = ofnode_count_phandle_with_args(dev_ofnode(dev), "clocks",
"#clock-cells");
if (clock_nb > 0) {
priv->clocks = devm_kcalloc(dev, clock_nb, sizeof(struct clk),
GFP_KERNEL);
if (!priv->clocks)
return -ENOMEM;
for (i = 0; i < clock_nb; i++) {
err = clk_get_by_index(dev, i, &priv->clocks[i]);
if (err < 0)
break;
err = clk_enable(&priv->clocks[i]);
if (err) {
pr_err("failed to enable clock %d\n", i);
clk_free(&priv->clocks[i]);
goto clk_err;
}
priv->clock_count++;
}
} else {
if (clock_nb != -ENOENT) {
pr_err("failed to get clock phandle(%d)\n", clock_nb);
return clock_nb;
}
}
priv->reset_count = 0;
reset_nb = ofnode_count_phandle_with_args(dev_ofnode(dev), "resets",
"#reset-cells");
if (reset_nb > 0) {
priv->resets = devm_kcalloc(dev, reset_nb,
sizeof(struct reset_ctl),
GFP_KERNEL);
if (!priv->resets)
return -ENOMEM;
for (i = 0; i < reset_nb; i++) {
err = reset_get_by_index(dev, i, &priv->resets[i]);
if (err < 0)
break;
if (reset_deassert(&priv->resets[i])) {
pr_err("failed to deassert reset %d\n", i);
reset_free(&priv->resets[i]);
goto reset_err;
}
priv->reset_count++;
}
} else {
if (reset_nb != -ENOENT) {
pr_err("failed to get reset phandle(%d)\n", reset_nb);
goto clk_err;
}
}
err = generic_phy_get_by_index(dev, 0, &priv->phy);
if (err) {
if (err != -ENOENT) {
pr_err("failed to get usb phy\n");
goto reset_err;
}
} else {
err = generic_phy_init(&priv->phy);
if (err) {
pr_err("failed to init usb phy\n");
goto reset_err;
}
}
hccr = map_physmem(dev_read_addr(dev), 0x100, MAP_NOCACHE);
hcor = (struct ehci_hcor *)((uintptr_t)hccr +
HC_LENGTH(ehci_readl(&hccr->cr_capbase)));
err = ehci_register(dev, hccr, hcor, NULL, 0, USB_INIT_HOST);
if (err)
goto phy_err;
return 0;
phy_err:
if (generic_phy_valid(&priv->phy)) {
ret = generic_phy_exit(&priv->phy);
if (ret)
pr_err("failed to release phy\n");
}
reset_err:
ret = reset_release_all(priv->resets, priv->reset_count);
if (ret)
pr_err("failed to assert all resets\n");
clk_err:
ret = clk_release_all(priv->clocks, priv->clock_count);
if (ret)
pr_err("failed to disable all clocks\n");
return err;
}
